Korth M, Nguyen N X, Horn F, Martus P
Department of Ophthalmology, University of Erlangen-Nürnberg, Germany.
Invest Ophthalmol Vis Sci. 1994 Feb;35(2):619-25.
The value of the ERG scotopic threshold response (STR), which is known to originate in the proximal retina and of the near-threshold scotopic PII(B-wave), was studied in glaucoma.
Full-field single flashes were presented under scotopic conditions in two subject groups, a glaucoma group (n = 30) and a normal control group (n = 35). The intensity level for evoking STR was where the maximum response occurs, whereas the intensity level for evoking scotopic PII was where the response begins to appear.
The STR is only slightly reduced in glaucoma (P = 0.046), but scotopic PII is significantly diminished (P < 0.0001).
The relatively intact STR in glaucoma suggests that structures responsible for its generation are less damaged in glaucoma than those responsible for scotopic PII.
